P0660

DTC P0660

CIRCUIT DESCRIPTION
An ignition 1 voltage is supplied directly to the intake manifold tuning (IMT) valve solenoid or variable geometry induction system (VGIS). The control module controls the IMT solenoid by grounding the control circuit via an internal driver switch. The primary function of the driver is to supply ground for the controlled component. The control module monitors the status of the driver. If the control module detects an incorrect voltage for the commanded state of the driver, DTC P0660 sets.

DTC DESCRIPTORS
This diagnostic procedure supports the following DTC:
DTC P0660 Intake Manifold Tuning (IMT) Valve Solenoid Control Circuit

CONDITIONS FOR RUNNING THE DTC
- The engine is operating.
- The ignition 1 voltage is more 10 volts.
- DTC P0660 runs continuously once the above conditions are met.

CONDITIONS FOR SETTING THE DTC
The ECM detects that the commanded state of the driver and the actual state of the control circuit do not match for more than 10 seconds.

ACTION TAKEN WHEN THE DTC SETS
- The control module stores the DTC information into memory when the diagnostic runs and fails.
- The malfunction indicator lamp (MIL) will not illuminate.
- The control module records the operating conditions at the time the diagnostic fails. The control module stores this information in the Failure Records.
- The driver information center, if equipped, may display a message.

CONDITIONS FOR CLEARING THE DTC
- A current DTC Last Test Failed clears when the diagnostic runs and passes.
- A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other non-emission related diagnostic.
- Clear the DTC with a scan tool.

TEST DESCRIPTION

Steps 1-5:

Steps 6-13:

Steps 14-15:

The numbers below refer to the step numbers on the diagnostic table.
2. A click should be heard or felt when the valve operates. Ensure that both the ON and the OFF states are commanded. Repeat the commands as necessary.
5. This step verifies that the ECM is providing ground to the IMT solenoid.
6. This step tests if the IMT solenoid control circuit is grounded.